A cable lifts a 1380-kg elevator at a constant velocity for a distance of 29 m What is the work done by each What?

Answer 1

Velocity not changing....so kinetic energy remains constant..only potential energy is changing....the work done is therefore....(mgh=1380*29*9.8J)=(392196J)

Answer 2

The work done by the cable is equal to the force applied by the cable multiplied by the distance it moves. The work done by the elevator is zero since it moves at a constant velocity, meaning there is no change in kinetic energy. The work done by the cable is equal to the force of gravity on the elevator multiplied by the distance it is lifted. Work = force x distance = (mass x gravity) x distance = (1380 kg x 9.8 m/s^2) x 29 m = 390,804 Joules.